Mold for boats of the canoe and like type



Jan. 10, 1928.

J. L. G. DYKES MOLD FOR BOATS OF THE CANOE AND LIKE TYPE Filed Aug. 18.1926 @Q f my.

Patented Jan. 10, 1928.

JOHN L. G. DYKES, F CHICAGO, ILLINOIS.

MOLD FOR BOATS 0F THE CANOE .AND LIKE TYPE.

Application filed August 18, 1926. Serial No. 129,945.

My present invention relates to improvements in'mold for boats of thecanoe and like type, in which a requisiteamount of strength must besecured with the greate est degree of lightness. Such boats haveheretofore been constructed by covering alight wooden frame of thenecessary longitudinal and transverse pieces With a covering of thinplanking, veneer, laminated veneer or canvas. Such structures have beenproduced with great elegance of workmanship and careful selection ofexpensive materials. The principal cost, however, of their construction,notwithstanding the cost of mate rials with which they are made, isoccasioned by the relatively large amount of skilled work that isrequisite in their fabrication. Further, no matter h ovv well suchstructures have hitherto been made, dampness unavoidably permeats theirframes and sheeting,

which causes swelling, blisters, disintegration and decay.

lin my improved mold for boat of the canoe type hereinafter describedthe entire structure is molded from a suitable. rubber compound andvulcanized under pressure.

lVooden transverse and longitudinal frame pieces may be employed, ifdesired, but if so employed, they should be Wholly embedded andvulcanized Within the rubber composition so that no portion of the frameis accessible to the action of either air or water.

Because of the strength of suitable rubber af, compositions, whenvulcanized, the' frame, if made of Wood in the usual manner, can beformed of much smaller and lighter pieces. Also with my construction,inasmuch as the frame is wholly covered and incorporated. in thevulcanite .whereit is protected from the action of both air and water,it can be made .of small pieces of steel or other metal, which has notheretofore been possible because ot the deterioration through rusting,Which is a characteristic of such metals When subject to the action ofmoisture and air. The conventional frame structure may, however, besupplied entirely by casting the reenforcements of the rubbercomposition itself integrally With the skin or body of the boat.

I have illustrated my improved light boat of the canoe type in theaccompanying drawinvin Which- 1g. 1 is a side view or elevation of atypical form of canoe embodying my invention;

Fig. 2 shows an end of the canoe in a mold, one side of the mold beingomitted to more llearly illustrate the details of the assemy 5 Fig. 3 isa top plan of the mold complete` ly assembled; and n Fig. 4 is afragment of a side of the boat after the same has been formed andvulcanized.

The exterior form of mold for my improved boat preferably comprises twolateral sections 5 and 6 meeting along their centers and bottoms in anenlargement or extension 7, provided with a series of transverse boltholes 8, by means of which the bottoms and ends of the two sections aresecured together.

rl'fhe interior faces 9 of the molds are of the shape which it isdesired to give to the exterior of completed boat and in each sectionrunning from adjacent the top to adjacent the meeting lower enlargementor extension 7 is an interior compartment 10 paralleling the inner faceof the mold into which is introduced the steam or other treat ingmediums for vulcanizing, tempering and chilling the product. rlhe moldsfor the interior of the boat are also in tvvo pieces, 11 and 12, ofgenerally triangular section.

The outside and bottom surfaces, 13, of these sections, 11 and 12, aregiven the form which it is desired to impart to the interior of theboat. rlhe sections 11 and 12 are somewhat less in combined Width thanthe completed boat and driven or pressed down betweentheir adjacentfaces is a Wedge, 14, by means of which the requisite degree of pressurecan be exerted upon the rubber composition, 15, of which the boat is tobe formed. f

At suitable intervals .along the top edges of the sections 5 and 6 aretransversely bored blocks. or upward embossments, 16, through whichjpass bolts, 17, for holding the molds vsecurely in position and underpressure during the vulcanizing process.

The interior sections 11 and 12 are also provided With interior cavities18 and 19 through which are circulated the necessary fluids foreffecting the vulcanization.

`It will be seen, especially from Fig. 4, that anydesired form of keel,20, gunwale, 2l, and rib arrangement, 22may be easily secured.

While the materials from-which my boats llt are made are not cheap andthe initial eX- pense of molds and equipment are heavy, I, nevertheless,eect such a saving in skilled labor over that necessary in fabricatingthe present similar structures that I am able to market my product at anattractive figure.

Further the product can be given a number of attractive colors. Also theskin action of glossy vulcanite with Water is much preferable to that ofany varnished or painted surface, My boats are wholly free from moisturedeterioration and with a less ,weight of materiali secure a tougher andstronger construction.

Having described my invention what I claim as new and desire to secureby Letters Patent is- A mold for a boat for integrally vulcanizing suchboat from a rubber composition comprising pairs of exterior and interiormold members having compartments therein for the circulation of heatingfluid7 means for-drawing the pairs of said exterior meinbers together,said interior members being of less Width than the space they are tooccupyl in the assembled mold and a Wedge entering between the pairs ofsaid interior members for forcing them into desired position.

JOHN L. G. DYKES.

